SAA4945H datasheet(8/20 Pages) PHILIPS

Part #	SAA4945H

Description	LIne MEmory noise Reduction IC LIMERIC

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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8 / 20 page

1997 Jun 10

8

Philips Semiconductors

Preliminary speciﬁcation

LIne MEmory noise Reduction IC

(LIMERIC)

SAA4945H

Table 8

Input /output data coding

INPUT

BIT

INPUT DATA SEQUENCE

YY7

Y07Y17Y27Y37

Y6

Y06Y16Y26Y36

Y5

Y05Y15Y25Y35

Y4

Y04Y14Y24Y34

Y3

Y03Y13Y23Y33

Y2

Y02Y12Y22Y32

Y1

Y01Y11Y21Y31

Y0

Y00Y10Y20Y30

U

UI1

U07U05U03U01

UI0

U06U04U02U00

V

VI1

V07V05V03V01

VI0

V06V04V02V00

WEI (PIN 21)

• Write enable input

• Write enable indicates the time when active input

samples (Y, U and V) are present

• Timing relation (see Fig.4) depending on the logic level

of the Write Enable Select signal (WES) in status

register; to adapt to different external video memories

• The number of input samples is a multiple of 4 (see

Fig.4)

• Start of new line indicated by write enable signal LOW

for at least 4 consecutive clock periods (see Fig.4)

• During active line, WE

I is not allowed to be LOW for

more than 1 clock cycle.

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